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2046
A boatman facing north wants to cross a flowing river to a point directly opposite its position at the other bank. If the river is flowing eastwards, in what direction should he row his boat?
  • A. west
  • B. east
  • C. north-west
  • D. north-east
  • E. south-west
View Answer & Discuss (4) WAEC 1991
2047
The diagram above represents six maximum and minimum thermometer. If the temperature of the surrounding falls, which of the following correctly states how the thermometer would respond to the change in temperature?
  • A. S1, would move upward but S2 would not move
  • B. S1 would not move but S2 would move upwards
  • C. both S1 and S2 would move upwards
  • D. S1 would move downwards and S2 would move downwardw
  • E. S1 would move downwards and S2 wouldnmove downwards
View Answer & Discuss (4) WAEC 1991
2048

A wire, 20m long is heated from a temperature of 5oC to 55oC. If the change in length is 0.020m, calculate the linear expansivity of the wire

  • A. 1.0 x 10-3k-1
  • B. 2.0 x 10-4k-1
  • C. 2.0 x 10-5k-1
  • D. 1.0 x 10-5k-1
  • E. 2.0 x 10-6k-1
View Answer & Discuss (11) WAEC 1991
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2049

A water fall is 420m high. Calculate the difference in temperature of the water between the top and bottom of the water fall. Neglect heat loses(g = 10.0m-2 specific heat capacity of water = 4.20 x 10\(^3\) JKg-1 K-1)

  • A. 0.1oC
  • B. 1.0oC
  • C. 42oC
  • D. 100oC
  • E. 4.20oC
View Answer & Discuss (5) WAEC 1991
2050
The set-up illustrated above shows a capillary tube of uniform cross-sectional area in two different arrangements. Using the data in the diagrams. Calculate the pressure of the atmosphere
  • A. 76cm of Hg
  • B. 75cm of Hg
  • C. 74cm of Hg
  • D. 60cm of Hg
  • E. 45cm of Hg
View Answer & Discuss WAEC 1991
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